Leukonychia (or leuconychia), also known as white nails or milk spots, is a medical term for white discolouration appearing on nails. It is derived from the Greek words leuko ("white") and nychia ("nails"). The most common cause is injury to the base of the nail (the matrix) where the nail is formed.

Answer this question: what are the white marks on your fingernails? Let's think fast. Stream of consciousness:
This is the relevant information: Leukonychia (or leuconychia), also known as white nails or milk spots, is a medical term for white discolouration appearing on nails. So the final answer is Leukonychia ( or leuconychia ) , also known as white nails or milk spots.